For instance, the protection and management of low/medium voltage transformers in rural areas require using specifically designed circuit breakers. Ensto’s pole mounted products NX2003252 and NX2003253 are adapted to significant load imbalances in electricity distribution network and guarantee full power availability for the end users − even in unbalanced conditions.
Digital Trip Unit offers better ROI
Ensto’s circuit breakers are equipped with a digital trip unit, which observes the thermal image of the transformer. The main advantage of the digital trip is that in an overload situation, as the transformer temperature will increase and the load will reach the limit level, the circuit breaker will switch off (trip).
When the circuit breaker is closed, a spark gap limits the rise in the potential of the low voltage neutral from the earth for a value exceeding 10 kV. When the circuit breaker is open, an electrical connection is done between the transformer neutral and the ground. This ensures that the transformer stays protected without damage. Hence, the working life of the transformer will be longer, which in turn brings a better return on investment for the utility.
Compact in Size, Excellent in Usability
As the circuit breakers have a very compact size of a laptop computer, they are easy to store, handle and install. The devices’ switch-on installation means that after wiring the cables, the device just needs to be switched on and it is ready to serve. The need for maintenance is minimal as the fuses do not need to be changed but just re-switched. This also means less waste, which is sustainable for the environment.
Air-break Technology and Customized Features
The smart devices use air-break technology and have chambers with metal partitions that cut the arc. Ensto customizes the products based on customer needs: for example, the fixing support, the type of the rod assembly, the trip unit type, and the load indicator option can be chosen on demand. Both NX2003252 and NX2003253 circuit breakers are suitable for all markets for efficient protection of overhead line networks.
Ensto’s circuit breakers offer several benefits for the distribution system owner
- Designed for MV/LV transformer protection (50 kVA, 100 kVA or 160 kVA).
- Very compact and easy to use and install.
- Minimal need for maintenance.
- Can be customized on demand.
